CN201057169Y - Fuel pump impeller for power car transformer device - Google Patents
Fuel pump impeller for power car transformer device Download PDFInfo
- Publication number
- CN201057169Y CN201057169Y CNU2007200635823U CN200720063582U CN201057169Y CN 201057169 Y CN201057169 Y CN 201057169Y CN U2007200635823 U CNU2007200635823 U CN U2007200635823U CN 200720063582 U CN200720063582 U CN 200720063582U CN 201057169 Y CN201057169 Y CN 201057169Y
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- CN
- China
- Prior art keywords
- impeller
- transformer
- oil pump
- fuel pump
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to an impeller of an oil pump used for locomotive transformer, which employs steel casting with a double ring structure, and the impeller is provided with 1 to 8 of balancing holes, which are communicated with motor intracavity; the balancing holes of the impeller, apart from balancing pump force in axial direction, undertakes oil circulation in the motor cavity and is in favor of motor cooling. The outlet angle of the blade is 30 degree; the inlet diameter of the impeller D0 is equal to 0.0375 -0.112m; the exit diameter of the impeller D2 is equal to 0.2293m.
Description
Technical field
The utility model belongs to a kind of modular construction of transformer, is a kind of impeller of cooling oil pump of transformer specifically, is mainly used in railway high speed locomotive transformer oil pump.
Background technique
Transformer oil pump is applicable to forced oil-circulation cooling systems such as Large and Medium-sized Power Transformer, rectifier transformer, reactor, electric locomotive traction transformer.A kind of all-sealed structure of transformer oil pump-be, the threephase asynchronous d-axis of built-in latent oil operation drives a centrifugal or axial--flow blading pump, is exclusively used in the fluid machinery of carrying the transformer insulation oil medium.Centrifugal transformer oil pump is applicable to transformer strong oil wind cooling device; Axial flow transformer oil pump (low lift, big flow) is applicable to transformer chip radiator.
Pressing the drive motor structure divides: the plain edition transformer oil pump of the special-purpose oil design of diving of the 1. traditional threephase asynchronous of domestic supporting employing at present; 2. the motor-driven disc type transformer oil pump of axial air-gap (disc type electric machine).The difference of two kinds of structures mainly is the drive motor difference, and function of use, installation form are identical.But because its distinctive axial magnetic pull effect of disc type pump, palpus in service is in time changed the bearing of wearing and tearing, causes the intense mechanical friction in case spline falls.The pump series products is to develop to high speed, efficient direction both at home and abroad at present.Suitable high-revolving transformer oil pump not only efficient height but also volume is little, good operation stability.Certainly, the slow-speed of revolution can improve the running life of bearing.But increase along with impeller diameter, equilibrium problem will be more outstanding, particularly unavoidable as conformity error on technology of its blade casting mold of vane pump, distortion angle, these all are the key factors that influences operation stability, do not do a good job in can reduce on the contrary the running life of bearing.The present motor-driven disc type transformer oil pump of a large amount of supporting employing axial air-gaps of domestic many units (disc type electric machine) (this oil pump is suitable to make low speed below 1000 rev/mins), this type of problem will be more outstanding.Because the axial magnetic pull of disc type electric machine is that very strong (it is exactly that axial magnetic pull by this rotation carries out the magneto-electric coupled rotor that makes and rotates, finish electric energy conversion), axial magnetic pull can make the wear extent gap of bearing be converted into the minimizing of air gap between stator and rotor, (disc type electric machine is very suitable for making the brake motor: brake block is installed between stator and rotor until the strong friction of stator and rotor iron and iron, the energising brake, dead electricity rotates freely).So still have many problems to need to solve for transformer oil pump, especially along with the continuous speed-raising of China railways, how to improve cooling effectiveness for the locomotive transformer of fast state, be vital for the normal operation that guarantees locomotive.
Chinese patent (patent No. is CN95232472.5, and name is called " high-speed and energy-saving transformer oil pump ") discloses a kind of improvement of high-speed and energy-saving transformer oil pump structure.The utility model comprises centrifugal oil pump, has impeller in the centrifugal oil pump, and its structure outline is that the import laying angle of the blade of impeller is 20 °～26 °, and the inlet side of the blade of impeller is 28 °～36 ° with the inclination angle of the axis of impeller.
Chinese patent (patent No. is CN03210998.9, and name is called " axial flow transformer oil pump ") discloses another kind of transformer oil pump, belongs to big-and-middle-sized transformer cooling system oil pump.This series Oil pump electrical machinery directly embeds assembling in the pump case, its rotor and the impeller formation rotor part that is integrated, and motor stator and pump-foot connect together, the formation stator component.
But the blade wheel structure of existing power locomotive transformer oil pump still is not quite reasonable, therefore exist efficient not high, for guarantee that pressure must improve that rotating speed comes that ubiquity oil pump volume is big, pump housing seepage, insulation class is low, rate of fault is high, working life is short deficiency, therefore necessary this is improved.
The model utility content
The purpose of this utility model is: at the deficiency of existing electric locomotive transformer with oil pump, develop that a kind of oil pump efficient is higher, rate of fault is low, the electric locomotive transformer fuel pump impeller of long service life.
The purpose of this utility model is achieved through the following technical solutions: a kind of transformer fuel pump impeller, it is characterized in that impeller adopts Cast Steel, impeller is the twoport ring structure, 1～8 equalizing orifice is arranged on impeller, communicate with motor cavity, impeller balance hole is except that playing the ballast pump responsive to axial force, also bear the circulation of motor cavity part oil, help the cooling of motor.Blade outlet angle is 30 °, impeller inlet diameter D
0=0.0375～0.112m; Impeller outlet diameter D
2=0.2293m, the impeller outlet diameter is 2.3: 0.4～1.1 with the ratio of impeller inlet diameter.
Advantage of the present utility model is: by reasonably selecting the import and export diameter of blade outlet angle and impeller for use, make the efficient of impeller significantly promote, do not reducing under the technical order prerequisite,, be reduced to rotating speed 1440r/min by original rotating speed 2950r/min by reducing the motor speed design.Reduce mechanical wear, improved bearing working life, reduced the electrical fault rate.
Description of drawings
Fig. 1 is the structural representation of the utility model impeller;
Fig. 2 is the blade outlet angle schematic representation of the utility model impeller;
Fig. 3 is the blade structure partial schematic diagram of the utility model impeller.
Embodiment
Accompanying drawing has provided embodiment of the present utility model, and the utility model will be further described below in conjunction with embodiment.
Embodiment one
From accompanying drawing 1 as can be seen, the utility model is a kind of transformer fuel pump impeller, it is characterized in that: impeller 1 adopts Cast Steel, impeller 1 is the twoport ring structure, and 1～8 balance cooling hole 2 is arranged on impeller 1, communicates with motor cavity, impeller 1 balance cooling hole 2, except that playing the ballast pump responsive to axial force, also bear the circulation of motor cavity part oil, help the cooling of motor.Blade 3 exit angle are 30 °, and impeller inlet diameter 4 is D0=37.5～112mm; Impeller outlet diameter 5 is D2=229mm, and the impeller outlet diameter is 2.3: 0.4～1.1 with the ratio of impeller inlet diameter.
Claims (2)
1. electric locomotive transformer fuel pump impeller is characterized in that: impeller adopts Cast Steel, and impeller is the twoport ring structure, and blade outlet angle is 30 °, and the impeller inlet diameter is D0=37.5～112mm; The impeller outlet diameter is D2=229mm, and the impeller outlet diameter is 2.3: 0.4～1.1 with the ratio of impeller inlet diameter.
2. electric locomotive transformer fuel pump impeller as claimed in claim 1 is characterized in that: 1～8 equalizing orifice is arranged on impeller, and equalizing orifice communicates with motor cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200635823U CN201057169Y (en) | 2007-06-18 | 2007-06-18 | Fuel pump impeller for power car transformer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200635823U CN201057169Y (en) | 2007-06-18 | 2007-06-18 | Fuel pump impeller for power car transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057169Y true CN201057169Y (en) | 2008-05-07 |
Family
ID=39426011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200635823U Expired - Lifetime CN201057169Y (en) | 2007-06-18 | 2007-06-18 | Fuel pump impeller for power car transformer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057169Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380302A (en) * | 2011-02-08 | 2013-10-30 | 大陆汽车有限责任公司 | Oil pump |
-
2007
- 2007-06-18 CN CNU2007200635823U patent/CN201057169Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380302A (en) * | 2011-02-08 | 2013-10-30 | 大陆汽车有限责任公司 | Oil pump |
| CN103380302B (en) * | 2011-02-08 | 2017-05-03 | 大陆汽车有限责任公司 | Oil pump |
| US10450909B2 (en) | 2011-02-08 | 2019-10-22 | Continental Automotive Gmbh | Oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |